Plug for use at an end of a tube



FIG. 1 is a perspective view of the plug for use at an end of a tube;

FIG. 2 is a front view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is an enlarged cross-sectional view along line 6-6 of FIG. 2;

FIG. 7 is an enlarged cross-sectional view along line 7-7 of FIG. 2;

FIG. 8 is an enlarged cross-sectional view along line 8-8 of FIG. 3;

FIG. 9 is a reference view of the plug for use at an end of a tube together with a heat exchanger pipe for a steam generator; and,

FIG. 10 is a reference view of plugs located in ends of tubes of heat exchanger pipes for a steam generator, a tube support plate, and a tube plate.

The broken lines in the drawings are included to show use and environment and form no part of the claimed design. 

CLAIM The ornamental design for a plug for use at an end of a tube, as shown and described. 